The uniqueness of humans has been claimed on many grounds, but most often because of our tool-making, culture, language, reason and morality. We have them, the other animals don't, and -- so the argument goes -- that's that.
For man, when perfected, is the best of animals, but, when separated from law and justice, he is the worst of all; since armed injustice is the more dangerous, and he is equipped at birth with the arms of intelligence and with moral qualities which he may use for the worst ends. Wherefore, if he have not virtue, he is the most unholy and the most savage of animals, and the most full of lust and gluttony. But justice is the bond of men in states, and the administration of justice, which is the determination of what is just, is the principle of order in political society.
Now and then we hear the wilder voices of the wilderness, from animals that in the hours of darkness do not fear the neighborhood of man: the coyotes wail like dismal ventriloquists, or the silence may be broken by the snorting and stamping of a deer.
I spend a hell of a lot of time killing animals and fish so I wouldn't kill myself. When a man is in rebellion against death, as I am in rebellion against death, he gets pleasure out of taking to himself one of the godlike attributes; that of giving it.
There is therefore no reason to put a limit to evolutionary possibility by taking our present organization or status of existence as final. The animal is a laboratory in which Nature has worked out man; man may very well be a laboratory in which she wills to work out superman, to disclose the soul as a divine being, to evolve a divine nature.
The indifference, callousness and contempt that so many people exhibit toward animals is evil first because it results in great suffering in animals, and second because it results in an incalculably great impoverishment of the human spirit.
Man is an essentially superstitious and fearful animal. Take away the herd's Christian gods and saints and they will without failing come to worship...something else.
For the real difference between humans and other animals is that humans alone have perception of good and evil, just and unjust, etc. It is the sharing of a common view in these matters that makes a household and a state.
We must recognise the essential underlaying savagery in the animal called man, and return to older and sounder principles of national life and defense. We must realise that man's nature will remain the same so long as he remains man; that civilisation is but a slight coverlet beneath which the dominant beast sleeps lightly and ever ready to awake.